mirror of
https://github.com/k3s-io/kubernetes.git
synced 2025-07-22 19:31:44 +00:00
apiextensions: low-level pruning algorithms
This commit is contained in:
Dr. Stefan Schimanski
parent
32d05973f5
commit
52577aa908
@ -0,0 +1,91 @@
|
||||
/*
|
||||
Copyright 2019 The Kubernetes Authors.
|
||||
|
||||
Licensed under the Apache License, Version 2.0 (the "License");
|
||||
you may not use this file except in compliance with the License.
|
||||
You may obtain a copy of the License at
|
||||
|
||||
http://www.apache.org/licenses/LICENSE-2.0
|
||||
|
||||
Unless required by applicable law or agreed to in writing, software
|
||||
distributed under the License is distributed on an "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
See the License for the specific language governing permissions and
|
||||
limitations under the License.
|
||||
*/
|
||||
|
||||
package pruning
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
|
||||
structuralschema "k8s.io/apiextensions-apiserver/pkg/apiserver/schema"
|
||||
)
|
||||
|
||||
// Prune removes object fields in obj which are not specified in s.
|
||||
func Prune(obj map[string]interface{}, s *structuralschema.Structural) {
|
||||
prune(obj, s)
|
||||
}
|
||||
|
||||
func prune(x interface{}, s *structuralschema.Structural) {
|
||||
if s != nil && s.XPreserveUnknownFields {
|
||||
skipPrune(x, s)
|
||||
return
|
||||
}
|
||||
|
||||
switch x := x.(type) {
|
||||
case map[string]interface{}:
|
||||
if s == nil {
|
||||
for k := range x {
|
||||
delete(x, k)
|
||||
}
|
||||
return
|
||||
}
|
||||
for k, v := range x {
|
||||
prop, ok := s.Properties[k]
|
||||
if ok {
|
||||
prune(v, &prop)
|
||||
} else if s.AdditionalProperties != nil {
|
||||
prune(v, s.AdditionalProperties.Structural)
|
||||
} else {
|
||||
delete(x, k)
|
||||
}
|
||||
fmt.Printf("deleting %q => %#v\n", k, x)
|
||||
}
|
||||
case []interface{}:
|
||||
if s == nil {
|
||||
for _, v := range x {
|
||||
prune(v, nil)
|
||||
}
|
||||
return
|
||||
}
|
||||
for _, v := range x {
|
||||
prune(v, s.Items)
|
||||
}
|
||||
default:
|
||||
// scalars, do nothing
|
||||
}
|
||||
}
|
||||
|
||||
func skipPrune(x interface{}, s *structuralschema.Structural) {
|
||||
if s == nil {
|
||||
return
|
||||
}
|
||||
|
||||
switch x := x.(type) {
|
||||
case map[string]interface{}:
|
||||
for k, v := range x {
|
||||
if prop, ok := s.Properties[k]; ok {
|
||||
prune(v, &prop)
|
||||
} else {
|
||||
skipPrune(v, nil)
|
||||
}
|
||||
}
|
||||
case []interface{}:
|
||||
for _, v := range x {
|
||||
skipPrune(v, s.Items)
|
||||
}
|
||||
default:
|
||||
// scalars, do nothing
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,298 @@
|
||||
/*
|
||||
Copyright 2019 The Kubernetes Authors.
|
||||
|
||||
Licensed under the Apache License, Version 2.0 (the "License");
|
||||
you may not use this file except in compliance with the License.
|
||||
You may obtain a copy of the License at
|
||||
|
||||
http://www.apache.org/licenses/LICENSE-2.0
|
||||
|
||||
Unless required by applicable law or agreed to in writing, software
|
||||
distributed under the License is distributed on an "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
See the License for the specific language governing permissions and
|
||||
limitations under the License.
|
||||
*/
|
||||
|
||||
package pruning
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"reflect"
|
||||
"testing"
|
||||
|
||||
structuralschema "k8s.io/apiextensions-apiserver/pkg/apiserver/schema"
|
||||
"k8s.io/apimachinery/pkg/runtime"
|
||||
"k8s.io/apimachinery/pkg/util/json"
|
||||
)
|
||||
|
||||
func TestPrune(t *testing.T) {
|
||||
tests := []struct {
|
||||
name string
|
||||
json string
|
||||
schema *structuralschema.Structural
|
||||
expected string
|
||||
}{
|
||||
{"empty", "null", nil, "null"},
|
||||
{"scalar", "4", &structuralschema.Structural{}, "4"},
|
||||
{"scalar array", "[1,2]", &structuralschema.Structural{
|
||||
Items: &structuralschema.Structural{},
|
||||
}, "[1,2]"},
|
||||
{"object array", `[{"a":1},{"b":1},{"a":1,"b":2,"c":3}]`, &structuralschema.Structural{
|
||||
Items: &structuralschema.Structural{
|
||||
Properties: map[string]structuralschema.Structural{
|
||||
"a": {},
|
||||
"c": {},
|
||||
},
|
||||
},
|
||||
}, `[{"a":1},{},{"a":1,"c":3}]`},
|
||||
{"object array with nil schema", `[{"a":1},{"b":1},{"a":1,"b":2,"c":3}]`, nil, `[{},{},{}]`},
|
||||
{"object array object", `{"array":[{"a":1},{"b":1},{"a":1,"b":2,"c":3}],"unspecified":{"a":1},"specified":{"a":1,"b":2,"c":3}}`, &structuralschema.Structural{
|
||||
Properties: map[string]structuralschema.Structural{
|
||||
"array": {
|
||||
Items: &structuralschema.Structural{
|
||||
Properties: map[string]structuralschema.Structural{
|
||||
"a": {},
|
||||
"c": {},
|
||||
},
|
||||
},
|
||||
},
|
||||
"specified": {
|
||||
Properties: map[string]structuralschema.Structural{
|
||||
"a": {},
|
||||
"c": {},
|
||||
},
|
||||
},
|
||||
},
|
||||
}, `{"array":[{"a":1},{},{"a":1,"c":3}],"specified":{"a":1,"c":3}}`},
|
||||
{"nested x-kubernetes-preserve-unknown-fields", `
|
||||
{
|
||||
"unspecified":"bar",
|
||||
"alpha": "abc",
|
||||
"beta": 42.0,
|
||||
"unspecifiedObject": {"unspecified": "bar"},
|
||||
"pruning": {
|
||||
"unspecified": "bar",
|
||||
"unspecifiedObject": {"unspecified": "bar"},
|
||||
"pruning": {"unspecified": "bar"},
|
||||
"preserving": {"unspecified": "bar"}
|
||||
},
|
||||
"preserving": {
|
||||
"unspecified": "bar",
|
||||
"unspecifiedObject": {"unspecified": "bar"},
|
||||
"pruning": {"unspecified": "bar"},
|
||||
"preserving": {"unspecified": "bar"}
|
||||
}
|
||||
}
|
||||
`, &structuralschema.Structural{
|
||||
Generic: structuralschema.Generic{Type: "object"},
|
||||
Extensions: structuralschema.Extensions{XPreserveUnknownFields: true},
|
||||
Properties: map[string]structuralschema.Structural{
|
||||
"alpha": {Generic: structuralschema.Generic{Type: "string"}},
|
||||
"beta": {Generic: structuralschema.Generic{Type: "number"}},
|
||||
"pruning": {
|
||||
Generic: structuralschema.Generic{Type: "object"},
|
||||
Properties: map[string]structuralschema.Structural{
|
||||
"preserving": {
|
||||
Generic: structuralschema.Generic{Type: "object"},
|
||||
Extensions: structuralschema.Extensions{XPreserveUnknownFields: true},
|
||||
},
|
||||
"pruning": {
|
||||
Generic: structuralschema.Generic{Type: "object"},
|
||||
},
|
||||
},
|
||||
},
|
||||
"preserving": {
|
||||
Generic: structuralschema.Generic{Type: "object"},
|
||||
Extensions: structuralschema.Extensions{XPreserveUnknownFields: true},
|
||||
Properties: map[string]structuralschema.Structural{
|
||||
"preserving": {
|
||||
Generic: structuralschema.Generic{Type: "object"},
|
||||
Extensions: structuralschema.Extensions{XPreserveUnknownFields: true},
|
||||
},
|
||||
"pruning": {
|
||||
Generic: structuralschema.Generic{Type: "object"},
|
||||
},
|
||||
},
|
||||
},
|
||||
},
|
||||
}, `
|
||||
{
|
||||
"unspecified":"bar",
|
||||
"alpha": "abc",
|
||||
"beta": 42.0,
|
||||
"unspecifiedObject": {"unspecified": "bar"},
|
||||
"pruning": {
|
||||
"pruning": {},
|
||||
"preserving": {"unspecified": "bar"}
|
||||
},
|
||||
"preserving": {
|
||||
"unspecified": "bar",
|
||||
"unspecifiedObject": {"unspecified": "bar"},
|
||||
"pruning": {},
|
||||
"preserving": {"unspecified": "bar"}
|
||||
}
|
||||
}
|
||||
`},
|
||||
{"additionalProperties with schema", `{"a":1,"b":1,"c":{"a":1,"b":2,"c":{"a":1}}}`, &structuralschema.Structural{
|
||||
Properties: map[string]structuralschema.Structural{
|
||||
"a": {},
|
||||
"c": {
|
||||
Generic: structuralschema.Generic{
|
||||
AdditionalProperties: &structuralschema.StructuralOrBool{
|
||||
Structural: &structuralschema.Structural{
|
||||
Generic: structuralschema.Generic{
|
||||
Type: "integer",
|
||||
},
|
||||
},
|
||||
},
|
||||
},
|
||||
},
|
||||
},
|
||||
}, `{"a":1,"c":{"a":1,"b":2,"c":{}}}`},
|
||||
{"additionalProperties with bool", `{"a":1,"b":1,"c":{"a":1,"b":2,"c":{"a":1}}}`, &structuralschema.Structural{
|
||||
Properties: map[string]structuralschema.Structural{
|
||||
"a": {},
|
||||
"c": {
|
||||
Generic: structuralschema.Generic{
|
||||
AdditionalProperties: &structuralschema.StructuralOrBool{
|
||||
Bool: false,
|
||||
},
|
||||
},
|
||||
},
|
||||
},
|
||||
}, `{"a":1,"c":{"a":1,"b":2,"c":{}}}`},
|
||||
}
|
||||
for _, tt := range tests {
|
||||
t.Run(tt.name, func(t *testing.T) {
|
||||
var in interface{}
|
||||
if err := json.Unmarshal([]byte(tt.json), &in); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
||||
var expected interface{}
|
||||
if err := json.Unmarshal([]byte(tt.expected), &expected); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
||||
prune(in, tt.schema)
|
||||
if !reflect.DeepEqual(in, expected) {
|
||||
var buf bytes.Buffer
|
||||
enc := json.NewEncoder(&buf)
|
||||
enc.SetIndent("", " ")
|
||||
err := enc.Encode(in)
|
||||
if err != nil {
|
||||
t.Fatalf("unexpected result mashalling error: %v", err)
|
||||
}
|
||||
t.Errorf("expected: %s\ngot: %s", tt.expected, buf.String())
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
const smallInstance = `
|
||||
{
|
||||
"unspecified":"bar",
|
||||
"alpha": "abc",
|
||||
"beta": 42.0,
|
||||
"unspecifiedObject": {"unspecified": "bar"},
|
||||
"pruning": {
|
||||
"pruning": {},
|
||||
"preserving": {"unspecified": "bar"}
|
||||
},
|
||||
"preserving": {
|
||||
"unspecified": "bar",
|
||||
"unspecifiedObject": {"unspecified": "bar"},
|
||||
"pruning": {},
|
||||
"preserving": {"unspecified": "bar"}
|
||||
}
|
||||
}
|
||||
`
|
||||
|
||||
func BenchmarkPrune(b *testing.B) {
|
||||
b.StopTimer()
|
||||
b.ReportAllocs()
|
||||
|
||||
schema := &structuralschema.Structural{
|
||||
Generic: structuralschema.Generic{Type: "object"},
|
||||
Extensions: structuralschema.Extensions{XPreserveUnknownFields: true},
|
||||
Properties: map[string]structuralschema.Structural{
|
||||
"alpha": {Generic: structuralschema.Generic{Type: "string"}},
|
||||
"beta": {Generic: structuralschema.Generic{Type: "number"}},
|
||||
"pruning": {
|
||||
Generic: structuralschema.Generic{Type: "object"},
|
||||
Properties: map[string]structuralschema.Structural{
|
||||
"preserving": {
|
||||
Generic: structuralschema.Generic{Type: "object"},
|
||||
Extensions: structuralschema.Extensions{XPreserveUnknownFields: true},
|
||||
},
|
||||
"pruning": {
|
||||
Generic: structuralschema.Generic{Type: "object"},
|
||||
},
|
||||
},
|
||||
},
|
||||
"preserving": {
|
||||
Generic: structuralschema.Generic{Type: "object"},
|
||||
Extensions: structuralschema.Extensions{XPreserveUnknownFields: true},
|
||||
Properties: map[string]structuralschema.Structural{
|
||||
"preserving": {
|
||||
Generic: structuralschema.Generic{Type: "object"},
|
||||
Extensions: structuralschema.Extensions{XPreserveUnknownFields: true},
|
||||
},
|
||||
"pruning": {
|
||||
Generic: structuralschema.Generic{Type: "object"},
|
||||
},
|
||||
},
|
||||
},
|
||||
},
|
||||
}
|
||||
|
||||
var obj map[string]interface{}
|
||||
err := json.Unmarshal([]byte(smallInstance), &obj)
|
||||
if err != nil {
|
||||
b.Fatal(err)
|
||||
}
|
||||
|
||||
instances := make([]map[string]interface{}, 0, b.N)
|
||||
for i := 0; i < b.N; i++ {
|
||||
instances = append(instances, runtime.DeepCopyJSON(obj))
|
||||
}
|
||||
|
||||
b.StartTimer()
|
||||
for i := 0; i < b.N; i++ {
|
||||
Prune(instances[i], schema)
|
||||
}
|
||||
}
|
||||
|
||||
func BenchmarkDeepCopy(b *testing.B) {
|
||||
b.StopTimer()
|
||||
b.ReportAllocs()
|
||||
|
||||
var obj map[string]interface{}
|
||||
err := json.Unmarshal([]byte(smallInstance), &obj)
|
||||
if err != nil {
|
||||
b.Fatal(err)
|
||||
}
|
||||
|
||||
instances := make([]map[string]interface{}, 0, b.N)
|
||||
|
||||
b.StartTimer()
|
||||
for i := 0; i < b.N; i++ {
|
||||
instances = append(instances, runtime.DeepCopyJSON(obj))
|
||||
}
|
||||
}
|
||||
|
||||
func BenchmarkUnmarshal(b *testing.B) {
|
||||
b.StopTimer()
|
||||
b.ReportAllocs()
|
||||
|
||||
instances := make([]map[string]interface{}, b.N)
|
||||
|
||||
b.StartTimer()
|
||||
for i := 0; i < b.N; i++ {
|
||||
err := json.Unmarshal([]byte(smallInstance), &instances[i])
|
||||
if err != nil {
|
||||
b.Fatal(err)
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user